The central heating works fine but recently the burner would go off a few minutes after turning on the hot water and now switching on hot water taps does not ignite the boiler and obviously the water is cold.
I have been told that this may be the diverter valve, if so is this reasonably easy to fit and are they easy to get hold of?
If it is the diverter valve you can tell by watching the spindle on the top of the valve when you open the hot tap.It should lift far enough to operate the micro switches.If it doesnt, then the diaphram in the valve (below the switches)is the common culprit.Its a pig to do whether its the valve or the diaphram
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.